<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>01css基本语法</title>
    <style>
        /*#box1 {
            width:500px;
            hight:300px;
            background-color: crimson;
            border: 1px blue solid;
        }*/
    </style>
    <link rel="stylesheet" href="../css/外联.css">
</head>
<body>
    <div id="box1" class="b1">我是盒子</div>
</body>
</html>